The impact of precursor thickness and surface roughness on the power factor of Cu2ZnSnS4 (CZTS) at near room temperature: Spin-coating deposition

IF 3.3 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Superlattices and Microstructures Pub Date : 2021-12-01 DOI:10.1016/j.spmi.2021.107091

Hassan Ahmoum , Guojian Li , Mohd Sukor Su'ait , Mourad Boughrara , Puvaneswaran Chelvanathan , Yassine Khaaissa , Mohamed Kerouad , Qiang Wang

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引用次数: 6

Abstract

This work investigated the thermoelectric properties of Cu₂ZnSnS₄ (CZTS) thin films deposited on the soda-lime glass using spin-coating techniques with different layers. X-ray diffraction (XRD) pattern confirms the increase of the layer number leads to improve the crystallite size and all the films exhibit tetragonal structure with the presence of secondary phases. EDX shows a reduction of Cu and Zn contents while an increase in Sn contents is observed when the thickness increases. Surface topography is also carried out to study the surface roughness and it is found to be minimum when we deposit 4 layers. The absorption spectra show that CZTS exhibit a bandgap varied between 1.33 and 1.9 eV, the resistivity and the Seebeck coefficient have been found to increase with the increase of surface roughness. This investigation indicates that Cu₂ZnSnS₄ thin films can be a suitable material for thermoelectric application at near room temperature range.

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前驱体厚度和表面粗糙度对近室温Cu2ZnSnS4 (CZTS)功率因数的影响:旋涂沉积

采用不同层数的自旋镀膜技术，研究了在钠石灰玻璃上沉积Cu2ZnSnS4 (CZTS)薄膜的热电性能。x射线衍射(XRD)图证实了层数的增加导致晶粒尺寸的增大，所有薄膜都呈现出二次相存在的四方结构。EDX显示，随着厚度的增加，Cu和Zn含量降低，Sn含量增加。表面形貌也进行了研究，发现当我们沉积4层时，表面粗糙度最小。吸收光谱表明，CZTS的带隙在1.33 ~ 1.9 eV之间，电阻率和塞贝克系数随表面粗糙度的增大而增大。研究表明，Cu2ZnSnS4薄膜是一种适合于近室温范围热电应用的材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Superlattices and Microstructures 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.20%

发文量

审稿时长

2.8 months

期刊介绍： Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4